Abstract: Major General Samuel Peter Heintzelman (1805-1880) was a Major General in the United States Army and served in the military
from 1825-1869. This collection of biographical material spans from 1864-1880 and includes two book excerpts and typed copies
of a newspaper obituary and follow-up letter.

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Biographical note

Samuel Peter Heintzelman (1805 September 30 – 1880 May 1) was a United States Army General. He served in the Seminole War,
the Mexican-American War, the Yuma War, and the Cortina Troubles.

In 1847, during the Mexican-American War, Heintzelman joined General Winfield Scott's army in Mexico, taking part in several
engagements. In 1848-49 he accompanied his regiment around Cape Horn to California, and for several years served in California
and the Arizona Territory. Major Heintzelman led the Yuma Expedition in December 1851 from the post of San Diego to put down
the Yuma uprising, called the Yuma War. His expedition established Fort Yuma and peace was made in October, 1852.

Heintzelman became the first president of the Sonora Exploring and Mining Company which established the Cerro Colorado, Arizona
mining town in southern Arizona. The town became famous during the American Civil War for the massacre of mine employees by
Mexican outlaws and for buried treasure.

At the outbreak of the Civil War, Heintzelman became the colonel of the 17th Pennsylvania Infantry, and was soon promoted
to command of a division in the Army of Northeastern Virginia. in late 1862, he was assigned to the defense of Washington,
D.C. in command of the Department of Washington. For the remainder of the war he commanding the Northern Department. Heintzelman
retired in 1869 as a major general in the regulars. He died in Washington, D.C., on May 1, 1880.